31708742832 has 480 divisors, whose sum is σ = 102762756096. Its totient is φ = 9057484800.

The previous prime is 31708742797. The next prime is 31708742843. The reversal of 31708742832 is 23824780713.

It is a super-2 number, since 2×31708742832² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 242051407 + ... + 242051537.

Almost surely, 2^31708742832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31708742832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51381378048).

31708742832 is an abundant number, since it is smaller than the sum of its proper divisors (71054013264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31708742832 is a wasteful number, since it uses less digits than its factorization.

31708742832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 31708742832 in words is "thirty-one billion, seven hundred eight million, seven hundred forty-two thousand, eight hundred thirty-two".